Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 777 · 40 questions

The fast method (One-step multiplier): Increase by p%: multiply by (100 + p)% — up 20% is × 1.2. Decrease by p%: multiply by (100 − p)% — down 25% is × 0.75. Easy way to multiply: × the whole number (115 or 75), then ÷ 100.

1. 1.475 increased by 12% =
2. 2.450 decreased by 8% =
3. 3.740 increased by 75% =
4. 4.150 increased by 12% =
5. 5.700 decreased by 12% =
6. 6.110 increased by 40% =
7. 7.172 increased by 25% =
8. 8.770 decreased by 30% =
9. 9.180 decreased by 15% =
10. 10.360 increased by 15% =
11. 11.160 increased by 15% =
12. 12.500 decreased by 12% =
13. 13.400 decreased by 8% =
14. 14.728 increased by 25% =
15. 15.108 increased by 50% =
16. 16.300 increased by 12% =
17. 17.325 increased by 40% =
18. 18.665 decreased by 60% =
19. 19.196 decreased by 25% =
20. 20.356 increased by 75% =
21. 21.320 increased by 35% =
22. 22.280 increased by 15% =
23. 23.120 increased by 10% =
24. 24.500 increased by 5% =
25. 25.440 decreased by 40% =
26. 26.556 decreased by 50% =
27. 27.60 increased by 35% =
28. 28.590 increased by 20% =
29. 29.590 increased by 60% =
30. 30.296 increased by 25% =
31. 31.700 increased by 30% =
32. 32.192 decreased by 75% =
33. 33.780 increased by 5% =
34. 34.400 increased by 35% =
35. 35.760 decreased by 30% =
36. 36.250 decreased by 10% =
37. 37.170 decreased by 60% =
38. 38.548 decreased by 25% =
39. 39.700 increased by 12% =
40. 40.180 increased by 35% =

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